This does depend on a number of factors. Light Emitting Diodes (LED's) emittance is measured primarily in Lumens & Kelvins. For a comprehensive guide please see our Light Bulbs Information Page for more details.
Our BC and SBC range of lampholders are both 2 amp rated so you can use a bulb up to 60W.
Our ES lampholders are higher rated 4 amps so you can use a bulb of up to 100W.
You can use LED bulbs with our lampholders as long as they are the equivalent wattage rating to above. Please see our Light Bulbs Information Page for more details.
The other consideration when choosing a bulb is what shade will be used. Generally the shade should have the same wattage rating as the bulb. LED bulbs give off so much less heat that we would advise they be used for fabric & paper shades.
SBC - small bayonet cap fitting takes a SBC bulb. Also known as B15d . Measures 15mm across.
BC - bayonet cap fitting takes a BC bulb. Also known as B22d. Measures 22mm across.
SES - small edison screw fitting takes a SES bulb. Also known as E14. Measures 14mm across.
ES - edison screw fitting takes an ES bulb. Also known as E27. Measures 27mm across.
GES - giant edison screw fitting takes a GES bulb. Also known as E40.
Incandescent bulbs are being phased out in order to reduce energy consumption of lighting in favour of the new LED bulbs which are available. The EU Directive banning the 40W bulb will be in force in full from 1st September 2018. However this only refers to those light bulbs meant for "household use", meaning manufacturers can continue to supply incandescent bulbs intended for industrial or rough service use or for decorative effect only. We have a great selection of LED bulbs but some of our customers have requested we continue to offer these incandescent bulbs whilst they are available. Customers will notice that these bulbs are therefore labelled on the packaging as "Special purpose bulbs and not intended for domestic use".
We recommend you use dimmers particularly with our filament LED bulbs so allowing you to appreciate the real beauty of the filaments in differing light conditions. Your existing dimmer switches may not work properly with LED bulbs if they are leading edge dimmers and this may lead to a shortened bulb life, a lower light output and a buzzing sound. For an optimum performance, you must use trailing edge dimmers which have lower minimum loads and are designed to be used with LED bulbs.